Captive Panel Screw, Head Type Round, Finish Plain, Material Stainless Steel, Drive Internal Hex, Thread Size 5/16 In.-18, Fastener Length 7/16 in, Minimum Thread Length 3/8 in, Head Width 0.469 in, Head Height 0.312 in, Drive Size 1/4 in, Maximum Head Width 15/32 in, Minimum Head Width Not Applicable, Maximum Head Height 5/16 in, Minimum Head Height Not Applicable, System of Measurement Inch, Dimensional Standards RoHS Compliant, Head Style Round, Material Grade/Class 18-8